From a265b3a890151e8de1d84e87c37a31f473aeda3c Mon Sep 17 00:00:00 2001
From: rick <rick@gnous.eu>
Date: Sun, 23 Apr 2023 02:59:28 +0200
Subject: [PATCH] add exit mode to use q and Q

---
 src/main.rs | 39 +++++++++++++++++++++++++++++----------
 1 file changed, 29 insertions(+), 10 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index abacf81..688c5ca 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -17,6 +17,13 @@ use nom::Err::Error;
 
 const FILE : &'static str = "test";
 
+#[derive(PartialEq)]
+enum Exit {
+    Continue,
+    HasBeenModified,
+    Quit,
+}
+
 // TODO juste $ pour l'instant dans l'adresse
 // TODO faire les commandes mais juste p pour l'instant
 // TODO faire un système de retour d'erreur pour afficher ? et l'erreur si l'utilisateur le demande
@@ -41,8 +48,8 @@ fn check_address_complete(c: char) -> bool {
     check_address(c) || c == ',' || c == ';'
 }
 
-fn execute_command(buffer: &mut Buffer, c: Command) -> bool {
-    let mut ret = false;
+fn execute_command(buffer: &mut Buffer, c: Command) -> Exit {
+    let mut ret = Exit::Continue;
 
     match c {
         Command::Append(a) => {
@@ -65,7 +72,15 @@ fn execute_command(buffer: &mut Buffer, c: Command) -> bool {
         },
         Command::Print(a) => buffer.print(a, false),
         Command::Number(a) => buffer.print(a, true),
-        Command::Quit(_) => ret = true,
+        Command::Quit(q) => if buffer.is_modified() {
+            if q {
+                ret = Exit::Quit;
+            } else {
+                ret = Exit::HasBeenModified;
+            }
+        } else {
+            ret = Exit::Quit;
+        },
         _ => (),
     }
 
@@ -99,25 +114,29 @@ fn main() {
     let mut buffer_struct = Buffer::new(buffer);
 
     println!("fichier lu !");
-    let mut quit = false;
+    let mut pred = Exit::Continue;
 
-    while !quit {
+    while pred != Exit::Quit {
         let mut input = String::new();
         match io::stdin().read_line(&mut input) {
             Ok(n) => {
                 let result_parse = parse_line(&input);
                 if let Ok(c) = result_parse {
-                    let tmp = execute_command(&mut buffer_struct, c);
-                    if tmp {
-                        quit = true;
+                    pred = match execute_command(&mut buffer_struct, c) {
+                        Exit::HasBeenModified => if pred == Exit::HasBeenModified {
+                            Exit::Quit
+                        } else {
+                            Exit::HasBeenModified
+                        },
+                        exit => exit,
                     }
                 } else if let Err(e) = result_parse {
                     println!("?");
                     println!("{}", e);
+                    pred = Exit::Continue;
                 }
             },
-            Err(e) => println!("error"),
+            Err(e) => panic!("{}", e),
         }
     }
-
 }